Inductor for magneto-electric machines



Oct. 2, 1928.

Filed Jan. 21,. 1928 Patented Oct. 2, 1928.

UNITED STATES PATENT OFFICE.

MARC ANTOINE PA'ITAY AND EUGENE movrmo'r, or GENEVA, SWITZERLAND, AS- srcmons T0 MAGNE'IAS LUCIZEER, socrizrn mom, or CABDU'GE-GENEVA, SWITZERLAND, A CORPORATION or SWITZEnLAHD.

INDUCTOR FOR MAGI TETO-ELECTRIC MACHINES.

Application filed January 21, 1928, Serial No. 248,826, and in Switzerland January 26, 1927.

The object of this invention is an improvement in inductors for magneto-electric ma- '-hincs, for instance in inductors for small machines serving for lighting of bicycles or for the supply of electric current for pocket lamps.

They com prise the same as known inductors ol magneto-electric machines, at least one pair of magnets which are applied against the surface of an envelope of non-magnetic material by means of members which are wedged between the ends of the magnets and upon which fixing members are operating which are bearing against the envelope.

They di l'l'cr, however, in this that the wedging members are made from magnetic material and do constitute one piece with the pole pieces which are in relation with the magnets exclusively by the intermediary of said wedging members, for the purpose of allowing the magnets to become wholly utilized from the magnet point of view.

The drawing shows by way of example one working form of the inductor according to invention.

Fig. 1 is a cross section according to line I-I of Fig. 2.

Fig. 2 is a section through the axis.

This working form comprises a cylindrical envelope a-?) made from non-magnetic material, for instance oi. brass, and consisting of short intervals or gaps g. The magnet faces,

which border and limit each gap, are planes which are parallel to the axis of the inductor and are sloping more and more from the bisector plane of the gap the more the axis'of the inductor is approached. The ga s {I are receiving ieces h-z' which in side e evation have the 5 mp0 of a trapezoid and which belong to members h, j, 2', k which also comprise the pole shoes 9', is. These latter are arranged in such a manner that they nowhere are directly contacting with the magnets. The two members are made from magnetic material,

for instance from soft steel. Screws Z, on are provided for dis lacing said members from the inside towarc s the outside, the bodies of the screws are traversing the members whilst their heads bear against the envelope a-b.

The inductor represented rotatesaround a fixed armature not shown In the dIEtWlIl".

The working form described ofi'ers different advantages: thanks to the fact that the magnets are of-semi-cireular shape, their magnetic conditions are good ones because they approach the ratio which is esteemed the possibly best determined ratio between the length of the magnets and their cross section.

trary to the case inwhich the pole shoes 7',

were in direct relation with the magnets and therefore a perceptible economy is realized of the magnet material, the costs of which-in the case of particular steels are sometimes very high.

b The magnets may be more than two in num- Instead of a rotary inductor a fixed one might be conceived and it might be utilized for machines of other kinds than. those mentioned in the introduction of this description.

\Vhat we claim is:

Inductor for magnet-electric machines comprising in combination a plurality of magnets, an envelope'of non-magnetic material and wedgingmembers of magnetic material, these wedging members being lodged between the adjacent ends of the magnets and adapted to apply these latter against the surface of said envelope of non-magnetic material, pole pieces constituting one piece with said wedging members and which are in relation with the magnets solely by the intermediary of the wedging members, so as to allow to wholly utilize the magnets from the magnet point of view, and fixing members which are operative on the wedging members and which are adapted to bear against said envelope of non-magnetic material.

In testimony whereof we have signed our names to this specification.

MARC ANTOINE PATTAY. EUGENE JAQUEMOT.

lOO

CERTIFICATE OF CORRECTION.

Patent No. 1,686,343. Granted October 2. 1928. to

MARC ANTOINE PATTAY ET AL.

patent was erroneously written and printed as "Magnetas Lucifer Societe, Anonyme"; whereas said name should have been written and printed as "Magnetos Lucifer Societe Anonyme'i, as shown bv the records of assignments in this office; and that the said M. J. Moore, Acting Commissioner of Patents. 

